feat: 修改群聊日报生成与群成员信息展示

- 支持结构化 AI 群聊日报及移动端长图导出
- 支持日报时间范围和消息类型筛选
- 支持群成员及当前用户群昵称解析
- 移除消息加载更多并优化图片懒加载
- 增强头像处理与敏感密钥日志保护

src/preload/index.d.ts

@@ -1,5 +1,6 @@
 import { ElectronAPI } from '@electron-toolkit/preload'
 import { Contact, Message } from '../shared/types'
+import { GroupReportExportRequest, GroupReportExportResult } from '../shared/group-report'
 
 export type ParsedContent =
   | { type: 'text'; content: string }
@@ -58,6 +59,8 @@ declare global {
         cdnUrl?: string,
         md5?: string
       ) => Promise<{ success: boolean; data?: string; error?: string }>
+      exportGroupReport: (request: GroupReportExportRequest) => Promise<GroupReportExportResult>
+      revealGroupReport: (filePath: string) => Promise<{ success: boolean; error?: string }>
     }
   }
 }